"Echoes" is a song by Pink Floyd including lengthy instrumental passages, sound effects, and musical improvisation. Written in 1970 by all four members of the group (credited as Roger Waters, Richard Wright, Nick Mason, David Gilmour on the original release), "Echoes" provides the extended finale to Pink Floyd's album Meddle. The track has a running time of 23:31 and takes up the entire second side of the vinyl recording.
It also appears in shortened form as the fifth track on the compilation album which took its name, Echoes: The Best of Pink Floyd. "Echoes" is the third-longest song in Pink Floyd's catalogue, after "Atom Heart Mother" (23:44) and the combined segments of "Shine On You Crazy Diamond" (26:01). Unlike those pieces, it is not explicitly divided into separate parts; however, the composition was originally assembled from separate fragments, and was later split in two parts to serve as both the opening and closing numbers in the band's film Live at Pompeii. The first part
